Pump valve



Dec, 11, 1923. 4 1,476,985

G. L. KOLLBERG PUMP VALVE Filed Nov. 1, 1919 Patented Dec. Il, 1923.

UNITED lSTATES PATENT OFFICE.

GUSTAF L. KOLLBERG, F MILWAUKEE, WISCONSIN, ASSIGNOR T0 -ALLIS-CHALMCIEERS l HANUFACTUBING COMPAN'Y,.0F MILWAUKEE, WISCONSIN, A CORPQRATION 0F DELAWARE.

PUMP VALVE.

Application med November 1, 1919. serial ne. 335,526.

To all whom t man concern.'

13e it known thatGUsTAr L. KoLLaERG, a citizen of the United States of Amerlca, re-

.siding at Milwaukee, in the county of Milploy india rubber or like material in the construction of disk valves for hydraulic These disk valves have invariably umps. geen formed of a circular disk or ring of india rubber of uniform thickness, having a plane surface coactable with the adjacent valve seat. f Such prior valves have proven objectionable for a number of different reasons, the more important of which being first, that the uniformity in thickness of the valves provides insuiiicient strength of material at the center thereof, and second, that the liquid in order to pass the valve seat is compelled to abruptly change its direction of flow through an angle of ninety degrees.

The present invention contemplates the provision of an improved valve structure in which these and other objectionable features are eliminated. It is further contemplated 'by the present invention to provide a valve The term india rubber as employed throughout this specification is intended to cover any material having characteristics similar to those of caoutchouc. Other specific terms are employed herein merely for the sake of clearness and should be given of the invention and of the operation of valves constructed in accordance therewith, may be had by referring to the drawing accompanying and forming a part of this specification in which like reference characters designatethe same or similar parts in the various views.

Fig. 1 is a central vertical section through a vertically disposed rubber pump valve and the structure cooperating therewith.

Fig. 2 is a central vertical section through a reversible vertically disposed rubber pump valfle and the structure cooperating therewit Referring specifically to Fig. 1, the circular metallic valve seat 7 has screw thread coaction with the pump casing 9, and is provided with a central circular downwardly converging boss 10 to which is secured a vertical guide rod 3 having a hexagonal end 2. The rod 3 may be unscrewed from the boss 10 by applying a wrench to the hexagonal end 2thereof. The seat 7 is provided with peripheral lugs 8 for permitting removal of the seat from the casing 9 with the aid of a wrench. The central boss 1,0 of the seat 7 is connected with the peripheral portion of the Seat by means of a series of radial ribs `11 which are slightly inclined in a generally helical direction approaching the valve 6. Mounted upon and concentrically with the guide rod 3 is an india rubber circular disk valve 6 having a downwardly converging seating surface 12 which coacts with the adj jacent similarly formed surface of the seat 7 and ribs 11. A circular weight 5 which rests upon the upper plane surface of the valve 6 is provided with a central wearin sleeve 4 which embraces the guide rod 3. Wardly converging or beveled seating surface 12 is thereby formed on what may be termed a stubby portion of the valve 6 lying between the seatin surface and the peripheral bounding sur ace extending lengthwise of the bore. Suiiicient clearance is permitted between the sleeve 4 and valve 6 and the rod 3 to permit free vertical sliding of these elements along the rod.

Referring specifically to the modified form of valve shown in Fig. 2, all of the elements are of the same general construction as those in the embodiment of Fig. 1 except thevalve 61 and the weighty 51. ln the modified form the valve 61 instead of having an upper plane surface is formed with an upwardly he downconverging csurface 13 whicl` is similar in form to the lower seating surface 12 of the valve.v The weight 51 is provided withY a lower tapered surfacewhich is adapted to fit either the surface 13 or the surface 12 of the'valve, thereby making the valve 61 reversible.

During the normal operation of the pump, the liquid is forced through the passages between the radial ribs 11 which due to their angular setting impart a slightly swirling motion to the passing liquid. As the pressure on the lower sideof a valve 6, 61 be- ,COmes sufficient to overcome that on top, the

valve is raised by the Huid which is discharged between ythe seat 7 and the adjacent valve surface 12, to the space surrounding the weight 5, 51. 'Due to the upwardly flaring formation of the lower surface 12 of the valve 6, 61 and the angularity of the ribs 1l,

the direction of the swirling fluid is gradu- V ally changed from a vertical direction of flow to flow in 'a direction parallel to the seating surface. The slight swirl imparted to the'liquid passing the valve 6, 61 produces intermittent rotation of the valve therebycausing the valve to assume a new position upon its seat after each discharge of-iuid froml the pump.

n It will be noted that by forming the seating surface 12 of the valve 6, 61 downwardly converging or beveled insteadof as a plane surface and forming the upper surface either plane or upwardly converging, the valve is n lensiderably thickened at its medial portion. '(35 his'formation produces a valve of cantalever cross section lwith the thickest portion adjacent its axis, which will more readily withstand the pressures to which it is subjected. The relatively thick and heavy valve 6, 61 produced by thickening the center thereof may also be formed of softer material without vdanger of distortion thereof,l

tically movable valves and the vertical rod The valve 61 disclosed in Fig. 2 may be readily reversed when worn along its lower surface 12 so as to permit coaction between the surface 13 thereof and the valve seat 7. It will also be observed that the valve 6, 61 besides coacting with the upper surfaces of the boss 10 and with theannular tapered seating portion of the seat 7, coacts directly with the upper extremities of the ribs 11, thereby producing maximum seating contact between the valve and the seat and preventing distortion of the valve by the pressures on the upper surfaces thereof. It will also be obvious that the valve 6, 61 may be provided with a spring or other means instead of the weight 5, 51, for urging the same toward its seat, this being a modification well known to those skilled in the art and requiring no detailed disclosure.

`It should be understood that it is not desired to limit the invention to the exact details of construction herein shown and described'for various modifications may occur to a person skilled in the art.

It is claimed and desired to secure by Letters Patent:

l. An article of manufacture comprising an india rubber pump valve having a central bore, a plane seating surface perpendicular to and intersecting said bore, a peripheral bounding surface extending lengthwise of said bore, and a beveled seating surface intersecting said plane and said peripheral surfaces to form obtuse angled edges only.

2. In combination, a rubber valve, a weight on said valve, a plane central seating surface on said valve, said valve between the outer edges of said Weight and seating surface forming a stubby portion having a beveled seating surface, and plane and beveled seats for said surfaces.

3. In combination, a hydraulically operated rubber valve, central guiding means and a beveled seat therefor, and a weight in contact with the upper side of said valve and extending over said seat, said valve having between the outer edge of said weight and the inner edge of said seat when the valve is seated a stubby portion formed with a seating surface.

In testimony whereof, the signature of the inventor is a Xed hereto.

GUSTAF L. KOLLBERG. 

